Paul I picked up a s/h 12" Ali powerbook G4 last weekend and must admit that i'm well impressed with it. Even though on paper it seems to be a fairly low spec item ( ie 867MHz chip and only 640 mb of Ram ) compared to the newer models it seems to zip along like a good 'un. At no point in the last week have i been hacked off at its lack of speed, or capability. my normal desktop machine has a 2.5GHz AMD chip and IGb of ram and doesn't now seem to be that much sharper, I suppose that i should also add that the 12" PB is hasn't been filled full of crap as yet and my desktop is jam packed and I often have loads of windows and apps going on at the same time....
I'm just in the process of filling up the iTunes library with my favorite CD's. I have the PB sitting on top of the Hi-Fi and plugged in to my Tuner input and reckon that it doesn't sound half bad either, certainly good enough for my modest needs. Had to play about with the onboard sound graphic equaliser first though, to get it just so